Development of Durable Green Concrete Exposed to Deicing Chemicals via Synergistic Use of Locally Available Recycled Materials and Multi-Scale Modifiers

Details

• Creators:
  Xie, Ning ; Cui, Na
• Corporate Creators:
  University of Alaska Fairbanks. Center for Environmental Sustainable Transportation in Cold Climates ; Western Transportation Institute
• Corporate Contributors:
  United States. Dept. of Transportation
• Subject/TRT Terms:
  • Admixtures
  • Binders
  • Deicing chemicals
  • Durability
  • Environmental impacts
  • Fly ash
  • Hydration
  • Mechanical properties
  • Recycled materials
  • Environment
  More +
• Publication/ Report Number:
  INE/AUTC 17.04 ; INE/CESTiCC 1502
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alaska ; United States
• Corporate Publisher:
  University of Alaska Fairbanks. Center for Environmentally Sustainable Transportation in Cold Climates
• Abstract:
  From the economic and social perspectives, the use of waste materials would not be attractive until their costs and quality can satisfy the construction requirements. In this study, a pure fly ash paste (PFAP) was developed in place of ordinary Portland cement paste (OPCP). This PFAP was prepared at room temperature and without direct alkali activation. The samples were prepared using only the as-received class C coal fly ash, water, and a very small amount of borax (Na2B4O7). On average, the PFAP featured 28-d compressive strength of about 36 MPa, and micro-nano hardness and elastic modulus 29% and 5%, higher than the OPCP, respectively. These mechanical and other properties of the PFAP make it a viable “green” construction binder suitable for a host of structural and non-structural applications. Advanced characterization of the raw material and PFAP pastes was employed to elucidate the hydration mechanisms of this “green” binder. The obtained knowledge sheds light on the role of class C CFA in the hydration process and may benefit the expanded use of various CFAs in cementitious materials.
• Format:
  PDF
• Funding:
  INE/CESTiCC 1502
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/34910/dot_34910_DS1.pdf
• File Type:
  [PDF - 2.87 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:9e7e80d537fcea26165da3ba8f9d8ac9e5e3315b63ff2c14120209352cb504a3